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    <title>实验4-1</title>

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    <caption>产品月销量</caption>

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        <th>ID</th><th>产品名称</th><th>销量</th>

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    <tr><td>2021090901</td><td>马克杯</td><td>5000</td></tr>

    <tr><td>2021090901</td><td>啤酒杯</td><td>5200</td></tr>

    <tr><td>2021090901</td><td>搪瓷杯</td><td>3500</td></tr>

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    <tr><th colspan="2" >合计</th><th>13700</th></tr>

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